You don't really have "issues" other than that you've become too comfortable with an
xterm-ism and incorrectly expect it to be universal.
xterm — and GUI terminal emulators like it such as gnome-terminal, lxterminal, konsole, and so forth — implemements what is known as an "alternate screen buffer". With one control sequence, programs can switch the terminal emulator to displaying and writing to that buffer. With another, they can switch back to the original screen buffer. Programs like
less) issue the first control sequence when they start up/resume, and the second when they shut down/suspend. This gives the effect of restoring the prior screen contents when
This is not a given.
Not all terminals and terminal emulators have an alternate screen buffer. The terminal emulator built into your operating system's kernel does not. If you had run
vim on a kernel virtual terminal, you would have seen this very same behaviour. Real terminals generally do not. (Actual DEC VT family terminals, for example, have a mechanism that involves "pages" that isn't the same and that is driven by a different set of control sequences.)
Even if your terminal has one, you must ensure that the termcap/terminfo entry for the current terminal type has the appropriate information, telling TUI programs like
nano and Midnight Commander what control sequences to emit for showing and hiding the alternate screen buffer. That's a combination of picking (and setting) an appropriate
TERM environment variable value to select an entry from Fedora's termcap/terminfo database that matches the capabilities of your local MacOS 10 terminal emulator, and of perhaps even editing that database.
Exactly what you set
TERM to isn't a fixed answer, as it depends from what emulation you have configured MacOS 10's terminal program to provide. For that, you will simply have to look at its settings. If you've told it to emulate xterm in 256 colour mode, then you'll have to pick a terminal type (very likely
xterm-256color) that describes that in Fedora's terminfo database.